TW201937896A - Prioritizing colliding transmissions in LTE and ultra-low latency LTE communications - Google Patents

Abstract

Various aspects described herein relate to receiving a first communication over a first set of resources based on a first transmission time interval (TTI), receiving a second communication over a second set of resources based on a second TTI, where the second TTI is smaller than the first TTI, and where the second set of resources overlap the first set of resources defining a common set of resources, and determining whether to prioritize receiving the first communication or the second communication in decoding communications received over the common set of resources.

Description

Prioritized collision transmission in long-term evolution and ultra-low-latency long-term evolution communications

What is described in this article is generally about the communication system, and more specifically, about the communication of priority wireless technology.

Wireless communication networks are widely deployed to provide various telecommunications services such as telephone, video, data, messaging and broadcasting. A typical wireless communication system may employ multiple access technologies, which can support communication with multiple users by sharing available system resources (eg, bandwidth, transmission power). Examples of such multiple access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems 1, single carrier frequency division multiple access (SC-FDMA) system and time division synchronous code division multiple access (TD-SCDMA) system.
These multiple access technologies have been adopted in various telecommunication standards to provide common protocols that enable different wireless devices to communicate at the city, national, regional, and even global levels. An example of a telecommunications standard is Long Term Evolution (LTE). LTE is an enhanced set of Global Mobile Telecommunications System (UMTS) mobile standards promulgated by the 3rd Generation Partnership Project (3GPP). It is designed to better support mobile broadband Internet access by improving spectrum efficiency, reducing costs, improving services, using new spectrum, and using OFDMA on the downlink (DL), uplink (UL) SC-FDMA and Multiple Input Multiple Output (MIMO) antenna technology are better integrated with other open standards. However, as the demand for mobile broadband access continues to increase, further improvements in LTE technology may be required. Preferably, these improvements should be applicable to other multiple access technologies and telecommunication standards using these technologies.
In a wireless communication system employing traditional LTE, multiple UEs served by a specific eNodeB may be scheduled resources for communicating with the eNodeB via one or more channels using a transmission time interval (TTI) of about 1 millisecond sub-frame. . Due to the increased UE capability and bandwidth requirements, it may be necessary to reduce delays in communication.

A simplified overview of one or more aspects is presented below to provide a basic understanding of these aspects. This summary is not an extensive overview of all aspects, and it is neither intended to identify key or important elements of all aspects nor to describe the scope of any or all aspects. The sole purpose of this summary is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.
According to an example, a method for wireless communication is provided. The method includes receiving a first communication based on a first transmission time interval (TTI) on a first resource set, and receiving a second communication based on a second TTI on a second resource set. The second TTI is smaller than the first TTI, and the second resource set overlaps the first resource set, thereby defining a common resource set. The method also includes determining whether to prioritize receiving the first communication or the second communication when decoding a communication received on the common resource set.
In other aspects, a user equipment for wireless communication is provided. The user equipment includes a transceiver, at least one processor communicatively coupled to the transceiver via a bus for communicating signals in a wireless network, and via the bus to the at least one processor and / Or the transceiver is communicatively coupled to a memory. The at least one processor and the memory are operable to receive a first communication based on a first TTI on a first resource set via the transceiver, and receive a communication based on a first TTI on a second resource set via the transceiver. A second communication of the second TTI. The second TTI is smaller than the first TTI, and the second resource set overlaps the first resource set, thereby defining a common resource set. The at least one processor and the memory are also operable to determine whether to prioritize receiving the first communication or the second communication when decoding a communication received on the common resource set.
In another example, a method of wireless communication is provided. The method includes allocating a first resource set for transmitting a first communication according to a first TTI, and allocating a second resource set for transmitting a second communication according to a second TTI. The second TTI is smaller than the first TTI. The method also includes transmitting a first resource grant corresponding to one of the first resource sets on a downlink control channel, and transmitting a second resource corresponding to one of the second resource sets on the downlink control channel. Granted.
In other aspects, an evolved Node B (eNB) for wireless communication is provided. The eNB includes a transceiver, at least one processor communicatively coupled to the transceiver via a bus for communicating signals in a wireless network, and the at least one processor and / or the transceiver via the bus The device is communicatively coupled to one of the memories. The at least one processor and the memory are operable to allocate a first resource set for transmitting a first communication according to a first TTI, and allocate a second resource set for transmitting a first communication according to a second TTI. A second communication. The second TTI is smaller than the first TTI. The at least one processor and the memory are also operable to transmit a first resource grant corresponding to one of the first resource set on a downlink control channel via the transceiver, and on the downlink via the transceiver A second resource grant corresponding to one of the second resource sets is transmitted on the channel control channel.
To achieve the foregoing and related objectives, one or more aspects include features described fully below and specifically pointed out in the scope of the patent application. The following description and the accompanying drawings detail certain illustrative features of one or more aspects. However, these features indicate only a few of the various ways in which the principles of various aspects can be employed, and this description is intended to include all such aspects and their equivalents.

according to 35 USC §119 Claim priority
This patent application claims a provisional application entitled "PRIORITIZING COLLIDING TRANSMISSIONS IN LTE AND ULTRA-LOW LATENCY LTE COMMUNICATIONS" filed on December 11, 2014 No. 62 / 090,826, which was assigned to the assignee and is hereby expressly incorporated herein by reference.
The detailed description set forth below in connection with the appended drawings is intended as a description of various configurations and is not intended to represent the only configurations in which the concepts described herein can be practiced. The detailed description includes specific details for the purpose of providing a thorough understanding of the various concepts. However, it will be apparent to those skilled in the art that these concepts can be practiced without these specific details. In some cases, well-known structures and components are shown in block diagram form in order to avoid obscuring these concepts.
Several aspects of telecommunication systems will now be presented with reference to various devices and methods. These devices and methods will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processing procedures, algorithms, etc. (collectively referred to as "elements") Instructions. These elements can be implemented using electronic hardware, computer software, or any combination thereof. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.
By way of example, an element or any part of an element or any combination of elements may be implemented with a "processing system" that includes one or more processors. Examples of processors include microprocessors, microcontrollers, digital signal processors (DSPs), field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gated logic, discrete hardware Circuitry and other suitable hardware configured to perform the various functionalities described throughout this disclosure. One or more processors in the processing system may execute software. Software should be broadly interpreted as meaning instructions, instruction sets, codes, code segments, code, programs, subroutines, software modules, applications, software applications, software packages, routines, subnormals, objects, Executing files, threads, programs, functions, etc., regardless of whether they are called software, firmware, intermediates, microcode, hardware description language, or others.
Thus, in one or more aspects, the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored on a computer-readable medium or encoded as one or more instructions or code on a computer-readable medium. Computer-readable media includes computer storage media. Storage media can be any available media that can be accessed by a computer. By way of example, and not limitation, this computer-readable medium may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage devices, magnetic disk storage devices, or other magnetic storage devices, or may be used to carry or store instructions or information Any other media in the form of structured required code and accessible by a computer. Disks and optical discs as used herein include compact discs (CDs), laser discs, optical discs, digital versatile discs (DVDs), and flexible disks, where magnetic disks typically reproduce data magnetically, and optical disks use lasers Optically reproduce data. The above combinations should also be included in the scope of computer-readable media.
The descriptions herein relate to various aspects of prioritization of collision communications corresponding to traditional communication technologies and ultra-low-latency (ULL) communication technologies, which can be based on different length transmission time intervals (TTI) (for example, ULL communication technology has a shorter TTI duration than traditional communication technology). For example, traditional LTE technology can utilize a TTI with the duration of a sub-frame defined in LTE, where ultra-low latency (ULL) LTE technology can be based on a TTI with a duration less than the sub-frame (e.g. , Two symbols, the time slot of the subframe, etc.). In this regard, lower delays in communication are obtained through shorter and more frequent TTIs. In some cases, the traditional technology may be a traditional honeycomb technology different from the traditional LTE technology. The network can support both traditional and ULL communication technologies on similar frequency bands, and therefore can potentially schedule collision downlink resources with one or more user equipments (UEs) on those collision downlink resources Receive signals from the network. For example, the collision of downlink resources may be caused in part by the shortened TTI associated with ULL, because resources can be allocated more frequently than traditional communication technologies, and resources scheduled for transmission by traditional communication technologies are also It may be at least partially scheduled for ULL communication technology transmission to meet the scheduling requirements in ULL communication technology. It should be understood that LTE and ULL LTE are used herein as examples of traditional and ULL communication technologies respectively, but it should be understood that the foregoing concepts can be applied to virtually any communication technology in which one communication technology has a shorter TTI than the other combination.
In one example, the UE may prioritize the reception of communications colliding on communication technologies (e.g., traditional LTE and ULL LTE resources) based on one or more rules configured in the UE, the one or more rules may Based at least in part on the type of communication over the resource. For example, where traditional technology communication includes broadcast data, demodulation reference signal (DM-RS), and / or the like, the UE may prioritize traditional technology over ULL communication in overlapping related resources Reception of communications. In another example, a network that supports traditional and ULL technologies and transmits associated communications can use resources to configure the UE, and can avoid overlapping traditional and ULL technology resources and / or can otherwise guide the UE to prioritize on specific overlapping resources Empower traditional or ULL technology communications.
Referring first to FIG. 1, a diagram illustrates an example of a wireless communication system 100 according to aspects described herein. The wireless communication system 100 includes a plurality of access points (for example, a base station, an eNB, or a WLAN access point) 105, a plurality of user equipment (UE) 115, and a core network 130. The access point 105 may include a scheduling component 302 configured to schedule and communicate with the UE 115 using conventional communication technologies and ULT communication technologies based on smaller TTIs (eg, traditional LTE and ULL LTE). Similarly, one or more of the UEs 115 may include a communication component 361 configured to prioritize communications for traditional communication technologies (e.g., LTE) and ULL communication technologies (e.g., ULL LTE). Some of the access points 105 may communicate with the UE 115 under the control of a base station controller (not shown), which in various instances may be the core network 130 or some access points 105 (e.g., Base station or eNB). The access point 105 may communicate control information and / or user data with the core network 130 via the backbone network link 132. In an example, the access points 105 may communicate with each other directly or indirectly via a backbone network link 134, which may be a wired or wireless communication link. The wireless communication system 100 can support operations on multiple carriers (waveform signals of different frequencies). Multi-carrier transmitters can simultaneously transmit modulated signals on multiple carriers. For example, each communication link 125 may be a multi-carrier signal modulated according to various radio technologies described above. Each modulated signal can be sent on a different carrier and can carry control information (for example, reference signals, control channels, etc.), additional burden information, data, and so on.
In some examples, at least a portion of the wireless communication system 100 may be configured to operate on multiple levels, in which one or more of the UEs 115 and one or more of the access points 105 One can be configured to support transmissions on a hierarchical level with reduced delay relative to another hierarchical level. In some examples, the hybrid UE 115-a may support a first layer of transmission that supports the use of a first TTI (which may be about "traditional communication technologies") and a second layer that supports the use of a second TTI that is shorter than the first TTI. TTI's second layer transmission (which may be related to "ULL communication technology") communicates with the access point 105-a on both the second layer layers.
In other examples, the second layer UE 115-b may communicate with the access point 105-b only on the second layer layer. Therefore, the hybrid UE 115-a and the second-layer UE 115-b may belong to the second level of the UE 115 that can communicate at the second-level layer, while the traditional UE 115 may belong to the second level that can communicate at the first-level layer only. First level of UE 115. The access point 105-b and the UE 115-b can communicate on the second level through the transmission of the sub-frames of the second sub-frame type. The access point 105-b may transmit communications related to only the first or second hierarchical layers or may transmit communications regarding both the first and second hierarchical layers. Where the access point 105-b supports both the first and second level layers, the communication component 361 may be configured to prioritize the first and second level layers received from the access point 105-b. Communication as described in this article.
The access point 105 may communicate wirelessly with the UE 115 via one or more access point antennas. Each of the access point 105 locations may provide communication coverage for a respective coverage area 110. In some examples, the access point 105 may be referred to as a base transceiver station, radio base station, radio transceiver, basic service set (BSS), extended service set (ESS), NodeB, eNodeB, home NodeB, home eNodeB, or Some other suitable term. The coverage area 110 of the base station can be divided into a plurality of sectors (not shown) constituting only a part of the coverage area. The wireless communication system 100 may include different types of access points 105 (e.g., macro, micro, and / or pico base stations). The access point 105 may also utilize different radio technologies, such as cellular and / or WLAN radio access technology (RAT). The access point 105 may be associated with the same or different access networks or operator deployments. The coverage area including the same or different types of access points 105, the coverage area of different access points 105 using the same or different radio technologies, and / or belonging to the same or different access networks may overlap.
In a network communication system using LTE / LTE-A and / or ULL LTE communication technologies, the term evolved Node B (eNodeB or eNB) may be generally used to describe the access point 105. The wireless communication system 100 can provide a heterogeneous LTE / LTE-A / ULL LTE network for different types of access points for various geographical areas. For example, each access point 105 may provide communication coverage for a macro cell, a pico cell, a pico cell, and / or other types of cells. Small cells such as pico cells, pico cells, and / or other types of cells may include low power nodes or LPNs. A macro cell generally covers a relatively large geographic area (e.g., a radius of several kilometers) and may allow unlimited access by the UE 115 in case of subscription by a service of a network provider. Small cells will generally cover a relatively small geographic area and allow unrestricted access by the UE 115 if subscribed by the service of the network provider, and for example, in addition to unrestricted access, Restricted access is provided by a UE 115 having an association with a small cell (e.g., a UE in a closed user group (CSG), a UE for users in the home directory, and the like). An eNB for a giant cell may be referred to as a giant eNB. An eNB for a small cell may be referred to as a small cell eNB. An eNB may support one or more (e.g., two, three, four, and similar) cells.
The core network 130 may communicate with the eNB or other access points 105 via one or more backbone network links 132 (eg, S1 interfaces, etc.). The access points 105 may also communicate with each other directly or indirectly, for example, via a backbone network link 134 (eg, an X2 interface, etc.) and / or via a backbone network link 132 (eg, via a core network 130). The wireless communication system 100 may support synchronous or asynchronous operation. For synchronous operation, the access points 105 may have similar frame timing, and transmissions from different access points 105 may be roughly aligned in time. For asynchronous operation, the access points 105 may have different frame timings, and transmissions from different access points 105 may be misaligned in time. In addition, the transmissions in the first layer and the second layer may or may not be synchronized between the access points 105. The techniques described herein can be used for synchronous or asynchronous operations.
UEs 115 are scattered throughout the wireless communication system 100, and each UE 115 may be stationary or mobile. UE 115 can also be referred to by those skilled in the art as mobile station, user station, mobile unit, user unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile user station, access Terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, user terminal, or some other suitable term. UE 115 can be a cellular phone, personal digital assistant (PDA), wireless modem, wireless communication device, handheld device, tablet computer, laptop, wireless phone, wearable object (such as a watch or glasses), wireless area Loop (WLL) station or similar. The UE 115 may be able to communicate with a giant eNodeB, a small cell eNodeB, a relay station, and the like. The UE 115 may also be able to communicate via different access networks, such as a cellular or other WWAN access network or a WLAN access network.
The communication link 125 shown in the wireless communication system 100 may include an uplink (UL) transmission from the UE 115 to the access point 105 and / or a downlink (DL) transmission from the access point 105 to the UE 115 . Downlink transmissions can also be referred to as forward link transmissions, and uplink transmissions can also be referred to as reverse link transmissions. The communication link 125 may carry transmissions at each level, and these transmissions may be multiplexed in the communication link 125 in some examples. The UE 115 may be configured to cooperatively communicate with multiple access points 105 via, for example, multiple-input multiple-output (MIMO), carrier aggregation (CA), coordinated multipoint (CoMP), or other schemes. MIMO technology uses multiple antennas on the access point 105 and / or multiple antennas on the UE 115 to transmit multiple data streams. Carrier aggregation can use two or more component carriers on the same or different servo cells for data transmission. CoMP may include techniques for coordinating transmission and reception through multiple access points 105 to improve the overall transmission quality of the UE 115 and increase network and spectrum utilization.
As mentioned, in some examples, the access point 105 and the UE 115 may utilize carrier aggregation to transmit on multiple carriers. In some examples, the access point 105 and the UE 115 may be transmitted in parallel in the first level of the frame, and each of the one or more sub-frames has a first sub-frame using two or more independent carriers Types of. Each carrier may have a bandwidth of, for example, 20 MHz, but other bandwidths may be utilized. The hybrid UE 115-a and / or the second-layer UE 115-b may, in some instances, use a single carrier to receive and / or transmit one or more sub-frames in the second layer, the single carrier having more The bandwidth of one or more of them. For example, if four independent 20 MHz carriers are used in the carrier aggregation scheme in the first layer, a single 80 MHz carrier can be used in the second layer. The 80 MHz carrier may occupy a portion of the radio frequency spectrum, which at least partially overlaps the radio frequency spectrum used by one or more of the four 20 MHz carriers. In some examples, the scalable bandwidth of the second tier type may provide (such as described above) a combination of techniques that provide shorter RTTs and further enhanced data rates.
Each of the different operation modes that can be adopted by the wireless communication system 100 can operate according to frequency division duplex (FDD) or time division duplex (TDD). In some examples, different layers may operate according to different TDD or FDD modes. For example, the first hierarchical layer may operate according to FDD, and the second hierarchical layer may operate according to TDD. In some examples, OFDMA communication signals may be used in communication link 125 for LTE downlink transmission at each level, and single-carrier frequency division multiple access (SC-FDMA) communication signals may be used in communication link 125. China and Israel are used for LTE uplink transmission in each layer. The following provides additional details regarding the implementation of layers in a system, such as the wireless communication system 100, and other features and functions regarding communication in such systems, with reference to the following figures.
FIG. 2 is a diagram illustrating an example of an access network 200 in an LTE or ULL LTE network architecture. In this example, the access network 200 is divided into a plurality of cellular areas (cells) 202. One or more lower power level eNBs 208 may have a honeycomb area 210 that overlaps one or more of the cells 202. The lower power level eNB 208 may be a pico cell (e.g., a home eNB (HeNB)), a pico cell, a pico cell, or a remote radio head end (RRH). The giant eNBs 204 are each assigned to a respective cell 202 and configured to provide access points to the core network 130 for all UEs 206 in the cell 202. In one aspect, the eNB 204 may include a scheduling component 302 configured to schedule and communicate with the UE 206 using conventional communication technologies and ULT communication technologies based on smaller TTIs (eg, traditional LTE and ULL LTE). Similarly, one or more of the UEs 206 may include a communication component 361 configured to prioritize communications for traditional communication technologies (e.g., LTE) and ULL communication technologies (e.g., ULL LTE). A centralized controller does not exist in this example of the access network 200, but a centralized controller may be used in alternative configurations. The eNB 204 is responsible for all radio related functions including: radio bearer control, admission control, mobility control, scheduling, security, and connection to one or more components of the core network 130.
The modulation and multiple access schemes employed by the access network 200 may vary depending on the particular telecommunications standard deployed. In LTE or ULL LTE applications, OFDM can be used on DL and SC-FDMA can be used on UL to support both frequency division duplex (FDD) and time division duplex (TDD). As those skilled in the art will easily understand and follow from the detailed description below, the concepts presented in this article are more applicable to LTE applications. However, these concepts can be easily extended to other telecommunication standards using other modulation and multiple access technologies. By way of example, these concepts can be extended to Evolution-Data Optimized (EV-DO) or Ultra Mobile Broadband (UMB). EV-DO and UMB are air interface standards promulgated by the 3rd Generation Partnership Project 2 (3GPP2) as part of the CDMA2000 standard family and using CDMA to provide broadband Internet access to mobile stations. These concepts can also be extended to Universal Terrestrial Radio Access (UTRA) using Wideband CDMA (W-CDMA) and other variants of CDMA (such as TD-SCDMA); Global System for Mobile Communications (GSM) using TDMA; and evolution UTRA (E-UTRA), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20 and flash OFDM using OFDMA. UTRA, E-UTRA, UMTS, LTE and GSM are described in documents from the 3GPP organization. CDMA2000 and UMB are described in documents from the 3GPP2 organization. The actual wireless communication standard and multiple access technology used will depend on the particular application and the overall design constraints imposed on the system.
The eNB 204 may have multiple antennas supporting MIMO technology. The use of MIMO technology enables the eNB 204 to exploit the spatial domain to support spatial multiplexing, beamforming, and transmission diversity. Spatial multiplexing can be used to simultaneously transmit different data streams on the same frequency. The data stream can be transmitted to a single UE 206 to increase the data rate or to multiple UEs 206 to increase the overall system capacity. This is achieved by spatially precoding each data stream (i.e., applying a scaling of amplitude and phase) and then transmitting each spatially precoded stream via multiple transmission antennas on the DL. The spatially pre-coded data stream arrives at the UE 206 through different spatial characteristics, which enables each of the UEs 206 to resume one or more data streams destined for that UE 206. On the UL, each UE 206 transmits a spatially precoded data stream, which enables the eNB 204 to identify the source of each spatially precoded data stream.
When channel conditions are good, space multiplexing is generally used. When channel conditions are less favorable, beamforming can be used to focus transmission energy in one or more directions. This can be achieved by spatially precoding the data for transmission via multiple antennas. To achieve good coverage at the cell edge, a single stream beamforming transmission can be used in combination with transmission diversity.
In the following detailed description, various aspects of the access network will be described with reference to a MIMO system supporting OFDM over DL. OFDM is a decentralized spectrum technique that modulates data on a large number of subcarriers within an OFDM symbol. The subcarriers are spaced at precise frequencies. This interval provides "orthogonality" that enables the receiver to recover data from the subcarriers. In the time domain, a guard interval (eg, a cyclic first code) may be added to each OFDM symbol to combat inter-OFDM symbol interference. UL may use SC-FDMA in the form of a DFT-dispersed OFDM signal to compensate for the high peak-to-average power ratio (PAPR).
FIG. 3 is a block diagram of an eNB 310 communicating with a UE 350 in an access network. In the DL, the upper layer packets from the core network are provided to the controller / processor 375. The controller / processor 375 implements the functionality of the L2 layer. In DL, the controller / processor 375 provides header compression, encryption, packet segmentation and reordering, multiplexing between logical channels and transport channels, and radio resource allocation to the UE 350 based on various priority metrics. The controller / processor 375 is also responsible for HARQ operations, retransmission of lost packets, and signaling to the UE 350.
The transmission (TX) processor 316 implements various signal processing functions for the L1 layer (ie, the physical layer). Signal processing functions include the following: facilitating coding and interleaving of forward error correction (FEC) at the UE 350 and based on various modulation schemes (e.g., binary phase shift keying (BPSK), quadrature phase shift keying ( QPSK), M phase shift keying (M-PSK), M quadrature amplitude modulation (M-QAM)) to signal cluster mapping. The encoded and modulated symbols are then split into parallel streams. Each stream is then mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., a pilot) in the time and / or frequency domain, and then combined using an inverse fast Fourier transform (IFFT) to generate a carrier Physical channel for time-domain OFDM symbol streams. The OFDM stream is spatially precoded to produce multiple spatial streams. Channel estimates from the channel estimator 374 can be used to determine encoding and modulation schemes and for spatial processing. Channel estimates may be derived from reference signals and / or channel condition feedback transmitted by the UE 350. Each spatial stream is then provided to a different antenna 320 via a separate transmitter 318TX. Each transmitter 318TX uses a separate spatial stream to modulate the RF carrier for transmission. In addition, the eNB 310 may include a scheduling component 302 configured to schedule and communicate with the UE 350 using conventional communication technologies and ULL communication technologies based on smaller TTIs (eg, traditional LTE and ULL LTE).
At the UE 350, each receiver 354RX receives a signal via its respective antenna 352. Each receiver 354RX restores the information modulated onto the RF carrier and provides that information to a receive (RX) processor 356. The RX processor 356 implements various signal processing functions of the L1 layer. The RX processor 356 performs spatial processing on the information to resume any spatial streaming to the UE 350. If multiple spatial streams go to the UE 350, these spatial streams can be combined into a single OFDM symbol stream by the RX processor 356. The RX processor 356 then uses a Fast Fourier Transform (FFT) to convert the OFDM symbol stream from the time domain to the frequency domain. The frequency domain signal contains an independent OFDM symbol stream for each subcarrier of the OFDM signal. The symbols and reference signals on each subcarrier are recovered and demodulated by determining the most likely signal cluster point transmitted by the eNB 310. Such soft decisions may be based on channel estimates calculated by the channel estimator 358. The soft decision is then decoded and deinterleaved to recover the data and control signals originally transmitted by the eNB 310 on the physical channel. The data and control signals are then provided to the controller / processor 359.
The controller / processor 359 implements the L2 layer. The controller / processor may be associated with a memory 360 that stores code and data. The memory 360 may be referred to as a computer-readable medium. In UL, the controller / processor 359 provides demultiplexing, packet reassembly, decryption, header decompression, and control signal processing between transport channels and logical channels to recover packets from the upper layers of the core network. The upper layer packet is then provided to a data store 362 representing all protocol layers above the L2 layer. Various control signals can also be provided to the data reservoir 362 for L3 processing. The controller / processor 359 is also responsible for error detection using acknowledgement (ACK) and / or negative acknowledgement (NACK) protocols to support HARQ operations. In addition, the communication component 361 is configured to prioritize communication between a conventional communication technology (for example, LTE) and a ULL communication technology (for example, ULL LTE).
In UL, the data source 367 is used to provide the upper layer packet to the controller / processor 359. The data source 367 represents all the protocol layers above the L2 layer. Similar to the functionality described in connection with the DL transmission by the eNB 310, the controller / processor 359 provides a header compression, encryption, packet segmentation and reordering based on the transmission by the eNB 310 between the logical channel and the transmission channel. The multiplexing of radio resource allocation is performed to implement the L2 layer for the user plane and the control plane. The controller / processor 359 is also responsible for HARQ operation, retransmission of lost packets, and signaling to the eNB 310.
Channel estimates derived by the channel estimator 358 from a reference signal or feedback transmitted by the eNB 310 may be used by the TX processor 368 to select an appropriate encoding and modulation scheme, and to promote spatial processing. The spatial streams generated by the TX processor 368 are provided to different antennas 352 via independent transmitters 354TX. Each transmitter 354TX uses a separate spatial stream to modulate the RF carrier for transmission.
UL transmissions are processed at the eNB 310 in a manner similar to that described in connection with the receiver function at the UE 350. Each receiver 318RX receives signals via its respective antenna 320. Each receiver 318RX restores the information modulated onto the RF carrier and provides this information to the RX processor 370. The RX processor 370 may implement an L1 layer.
The controller / processor 375 implements the L2 layer. The controller / processor 375 may be associated with a memory 376 that stores code and data. The memory 376 may be referred to as a computer-readable medium. In UL, the controller / processor 375 provides demultiplexing, packet reassembly, decryption, header decompression, and control signal processing between transport channels and logical channels to recover packets from the UE 350 upper layer. The upper layer packets from the controller / processor 375 can be provided to the core network. The controller / processor 375 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operations.
FIG. 4 is a diagram illustrating a non-limiting example of a ULL timeline 400, 402 for managing ULL communication in a wireless communication system, in which time development extends from left to right. In this example, the timeline 400, 402 includes a ULL frame of the symbol duration in each symbol of the sub-frame. Timelines 400 and 402 both depict symbols representing TTIs for ULL entity downlink control channel (uPDCCH) and / or ULL entity downlink shared channel (uPDSCH) and representations including ULL entity uplink control channel (uPUCCH ) And / or the TTI symbol of the ULL entity uplink shared channel (uPUSCH). In the timeline 400, 14 symbols are displayed in a given sub-frame (for example, for a normal CP), and in the timeline 402, 12 symbols are displayed in a given sub-frame (for example, for an extended CP). In either case, lower latency is achieved in ULL by using symbol-based TTI. It will be understood that in other examples, the TTI may be two or more symbols, a time slot of a sub-frame (where the sub-frame includes two time slots), and the like. In addition, the response time of the HARQ handler can be 3 symbols (or 4 symbols, 3 double symbols, 3 time slots, etc.). In the depicted example, in the subframe, uPDCCH / uPDSCH is transmitted in symbol 0, and HARQ is processed and transmitted in symbol 4, and so on.
5 is a diagram illustrating a non-limiting example of a 1ms sub-frame 500 including a conventional downlink transmission resource 502 for a conventional communication technology. The traditional downlink transmission resource 502 may correspond to, for example, physical data shared channel (PDSCH) / enhanced physical downlink control channel (EPDCCH) transmission in LTE, and may include one or more non-DM-RS regions 504 and one Or multiple DM-RS areas 506, where the DM-RS area 506 includes resource elements (eg, connected groups of resource elements) configured for DM-RS transmission. Therefore, as shown, the ULL transmission resources may be assigned so as not to overlap the traditional downlink transmission resources 502, as shown by the example ULL transmission resources 510. However, in other examples, the ULL transmission resource may be assigned to overlap the traditional downlink transmission resource 502 in the non-DM-RS region 540, as shown by the ULL transmission resource 512, or assigned to the DM-RS region 506. The middle-downlink traditional downlink transmission resource 502 is as shown by the ULL transmission resource 514. This may occur, for example, if the eNB assigns ULL transmission resources 514 while transmitting on traditional downlink transmission resources (as assignments may occur in the ULL at a faster rate due to the shortened TTI).
The UE may therefore be configured to prioritize communications in which traditional downlink transmission resources overlap with ULL transmission resources (eg, for ULL transmission resources 512 and 514), as described further herein. In one example, traditional downlink transmission resources 502 and ULL transmission resources 510, 512, or 514 may be related to a given UE. Therefore, the UE may be configured to prioritize communications received on the traditional downlink transmission resource 502 and the overlapping ULL transmission resource 512 or 514. In another example, traditional downlink transmission resources 502 and ULL transmission resources 512, 514 may be related to different UEs, and UEs related to ULL transmission resources 512, 514 may be configured to transmit resources in traditional downlink 502 corresponds to prioritizing communications received on overlapping ULL transmission resources 512 and 514 in the case of communications with one or more other UEs, as further described herein.
It should be understood that in LTE, an eNB may transmit DM-RS in one or more Division Code Multiplexing (CDM) groups, where the DM-RS may be based on rank (eg, the number of antennas used to transmit the DM-RS) Multiplexed in each CDM group. For example, for a rank less than or equal to four, the eNB may transmit a DM-RS based on a spreading factor of two so that the DM-RS is spread across two consecutive OFDM symbols in time. For example, for ranks greater than four, the eNB may transmit a DM-RS based on a spreading factor of four, so that the DM-RS spreads in time across four consecutive OFDM symbols.
6 to 8, aspects are depicted with reference to one or more components and one or more methods that can perform the actions or functions described herein. In one aspect, the term "component" as used herein may be one of the parts constituting a system, may be hardware or software, or some combination thereof, and may be divided into other components. Although the operations described below in FIG. 7 and FIG. 8 are presented in a specific order and / or presented as being performed by the instance components, it should be understood that the ordering of the actions and the components that perform the actions may vary depending on the implementation. In addition, it should be understood that the following actions or functions may be performed by a specially-programmed processor, a processor executing specially-programmed software or a computer-readable medium, or any other hardware component and / or software component capable of performing the described action or function. Combined execution.
FIG. 6 illustrates an example system 600 for prioritizing traditional or ULL communications. System 600 includes communication with eNB 604 (examples of which are described above in FIGS. 1-3 (e.g., access point 105, eNB 204, lower power level eNB 208, eNB 310, UE 115, 206, 350, etc.)) UE 602 communicating to access a wireless network. In one aspect, the eNB 604 and the UE 602 may have established one or more downlink channels, and communicate on the downlink channels via a downlink signal 609, and the downlink signals may be transmitted by the eNB 604. Transmitted (e.g., via transceiver 656) and received by UE 602 (e.g., via transceiver 606) for transmitting control and / or data messages (e.g., in signaling) from the eNB over the configured communication resources 604 is communicated to UE 602. In addition, for example, the eNB 604 and the UE 602 may have established one or more uplink channels on which to communicate via an uplink signal 608, which may be transmitted by the UE 602 (e.g., (Via transceiver 606) and received by eNB 604 (e.g., via transceiver 656) for communicating control and / or data messages (e.g., in signaling) from the UE 602 over the configured communication resources Go to eNB 604. As further described herein, for example, the eNB 604 may communicate resource grants 680 that may indicate resources on which the UE 602 communicates (eg, transmits or receives) data with the eNB 604, where the resources may correspond to traditional and / Or ULL communication technology, as described. For example, resources related to ULL communication technology may be related to the ULL timeline (e.g., a timeline with a TTI smaller than a sub-frame in duration, such as timelines 400, 402 in FIG. 4).
In one aspect, the UE 602 may include one or more processors 603 and / or memory 605 that may be communicatively coupled, for example, via one or more buses 607, and may be used in combination to receive data from the eNB 604. The grant of resources in traditional and / or ULL communication technologies and the operation or other implementation of communication components based on the grant of communication components 361 to communicate over those resources. For example, various operations related to the communication component 361 may be performed or otherwise performed by one or more processors 603, and in one aspect, may be performed by a single processor, while in other aspects, the operations in The difference may be performed by a combination of two or more different processors. For example, in one aspect, the one or more processors 603 may include a modem processor or a baseband processor or a digital signal processor or a special application integrated circuit (ASIC) or a transmission processor or a reception processor. Or any one or any combination of transceiver processors associated with the transceiver 606. In addition, for example, the memory 605 may be a non-transitory computer-readable medium, which includes (but is not limited to) random access memory (RAM), read-only memory (ROM), programmable ROM (PROM), Erase PROM (EPROM), electrically erasable PROM (EEPROM), magnetic storage devices (e.g., hard disks, flexible disks, magnetic tapes), optical disks (e.g. compact discs (CD), digital versatile discs (DVD)) , Smart cards, flash memory devices (e.g., cards, sticks, flash drives), registers, removable disks, and for storing software and / or accessible by a computer or one or more processors 603 And any other suitable medium that reads computer-readable code or instructions. In addition, the memory 605 or computer-readable storage medium may reside in one or more processors 603, external to one or more processors 603, dispersed across multiple entities including one or more processors 603, and the like.
Specifically, the one or more processors 603 and / or the memory 605 may perform actions or operations defined by the communication component 361 or its sub-components. For example, the one or more processors 603 and / or the memory 605 may execute the first and the first defined by the communication prioritization component 610 for determining whether to prioritize and respectively based on different TTIs received on a common resource. The action or operation of the first or second communication related to the second resource. For example, in one aspect, the communication prioritization component 610 may include hardware (eg, one or more processor modules of one or more processors 603) and / or stored in the memory 605 and Computer readable code or instructions executable by at least one of the one or more processors 603 to perform the specially configured communication prioritization operations described herein. In addition, for example, the one or more processors 603 and / or the memory 605 may perform actions or operations defined by the optional common resource determination component 612 for determining a common resource where the first and second communications overlap. For example, in one aspect, the common resource determination component 612 may include hardware (e.g., one or more processor modules of one or more processors 603) and / or stored in the memory 605 and configured by Computer-readable code or instructions executable by at least one of the one or more processors 603 to perform the specifically configured resource determination operations described herein. In addition, for example, the one or more processors 603 and / or the memory 605 may optionally perform the operations defined by the optional prioritization information receiving component 614 for obtaining information about prioritizing the first or second communication on a common resource Information action or operation. For example, in one aspect, the prioritized information receiving component 614 may include hardware (eg, one or more processor modules of one or more processors 603) and / or stored in the memory 605 And computer-readable code or instructions executable by at least one of the one or more processors 603 to perform the specially configured information receiving operations described herein.
Similarly, in one aspect, the eNB 604 may include one or more processors 653 and / or memory 655 that may be communicatively coupled, for example, via one or more buses 657, and may be combined for Generate a scheduling component 302 for resource granting by the UE 602 and / or other UEs to operate or otherwise implement the scheduling component. For example, various functions related to the scheduling component 302 may be implemented or otherwise performed by one or more processors 653, and may be performed by a single processor in one aspect, and in other aspects, among the functions The difference may be performed by a combination of two or more different processors, as described above. It should be understood that in one example, one or more processors 653 and / or memory 655 may be configured as described above in the example of one or more processors 603 and / or memory 605 of UE 602.
In one example, one or more processors 653 and / or memory 655 may perform actions or operations defined by the scheduling component 302 or its sub-components. For example, one or more processors 653 and / or memory 655 may execute a first resource set (e.g., based on a first TTI operation) defined by the traditional resource allocation component 620 for allocation to one or more UEs. (Resources in traditional communication technology). For example, in one aspect, the traditional resource allocation component 620 may include hardware (e.g., one or more processor modules of one or more processors 653) and / or stored in the memory 655 and configured by Computer-readable code or instructions executable by at least one of the one or more processors 653 to perform the specially configured traditional resource allocation operations described herein. In addition, for example, one or more processors 653 and / or memory 655 may execute a second resource set defined by the ULL resource allocation component 622 for allocation to one or more UEs (e.g., based on being shorter than the first TTI The second TTI operation (ULL communication technology resource) action or operation. For example, in one aspect, the ULL resource allocation component 622 may include hardware (e.g., one or more processor modules of one or more processors 653) and / or stored in the memory 655 and configured by Computer-readable code or instructions executable by at least one of the one or more processors 653 to perform the specifically configured ULL resource allocation operations described herein. In addition, for example, the one or more processors 653 and / or the memory 655 may execute, as defined by the optional communication prioritization indicating component 624, instructions to the one or more UEs regarding the prioritization in the first and second The action or operation of information communicated on overlapping resources in resource allocation. For example, in one aspect, the communication prioritization indication component 624 may include hardware (eg, one or more processor modules of one or more processors 653) and / or stored in the memory 655 And computer-readable code or instructions executable by at least one of the one or more processors 653 to perform the specialized prioritized instruction operations described herein.
It should be understood that the transceivers 606, 656 may be configured to transmit and receive wireless signals via one or more antennas, an RF front end, one or more transmitters, and one or more receivers. In one aspect, the transceivers 606, 656 can be tuned to operate at a specified frequency so that the UE 602 and / or the eNB 604 can communicate at a certain frequency. In one aspect, the one or more processors 603 may configure the transceiver 606 and / or the one or more processors 653 may configure the transceiver 656 to operate at a specified frequency and power level based on a configuration, a communication protocol, etc. Down operation to communicate the uplink signal 608 and / or the downlink signal 609 on the relevant uplink or downlink communication channel, respectively.
In one aspect, the transceivers 606, 656 can operate in multiple frequency bands (eg, using a multi-band multi-mode modem, not shown), so as to process digital data transmitted and received using the transceivers 606, 656. In one aspect, the transceivers 606, 656 may be multi-band and configured to support multiple frequency bands for a particular communication protocol. In one aspect, the transceivers 606, 656 can be configured to support multiple operating networks and communication protocols. Thus, for example, the transceivers 606, 656 may enable transmission and / or reception of signals based on a given modem configuration.
FIG. 7 illustrates resources used for prioritization (e.g., by a UE) shared by a first communication based on a first TTI (e.g., traditional communication) and a second communication based on a shorter second TTI (e.g., ULL communication) Method 700 of communication on a set. At block 702, the UE may receive a first communication based on a first TTI on a first resource set. In one aspect, the communication component 361 (FIG. 6) may receive (e.g., via the transceiver 606) a first TTI-based first communication on a first set of resources. In one example, the first communication may correspond to broadcast data transmitted by the eNB 604, such as control or traffic data related to system information transmission, paging transmission, random access transmission, and the like. In another example, the first communication may correspond to unicast data, which may or may not be related to the UE 602, such as control or traffic data, reference signals, and the like. In a specific example, the first communication may correspond to a PDSCH / EPDCCH, one or more DM-RS symbols, and / or the like of a conventional communication technology (eg, LTE). It should be understood that the eNB 604 may allocate the first and / or second resources to the UE 602 for receiving communications from the eNB 604, as described further herein.
At block 704, the UE may receive a second communication based on a second TTI on a second resource set, wherein the second TTI is smaller than the first TTI, and wherein the second resource set overlaps the first resource Set, thus defining a set of common resources. In one aspect, the communication component 361 may similarly receive (eg, via the transceiver 606) a second TTI-based second communication on a second resource set, wherein the second TTI is smaller than the first TTI, and wherein the The second resource set overlaps the first resource set, thereby defining a common resource set. In one example, the second communication may correspond to control or traffic data of a ULL communication technology (eg, ULL LTE) with a smaller TTI than the traditional communication technology of the first communication. In one example, the first TTI may be a sub-frame in a duration (eg, where the first communication is related to LTE), and the second TTI may be one symbol, two symbols, a time slot, etc. in the duration. As described, the first and second resource sets may overlap, for example, as shown in FIG. 5, where the first resource set may correspond to a resource in a traditional downlink transmission resource 502, and the second resource set may correspond to a ULL A resource in one or more of the transmission resources 512 or 514.
Therefore, at block 706, the UE may determine whether to prioritize receiving the first communication or the second communication when decoding a communication received on the common resource set. In one aspect, the communication prioritization component 610 may determine whether to prioritize the reception of the first communication or the second communication when decoding a communication received on the common resource set. This may include a common resource determination component 612 determining a common resource set between the first and second communications, and a communication prioritization component 610 determining some aspects of the common resources. For example, the common resource determination component 612 may determine based at least in part on receiving allocation information for the first resource set and / or the second resource set from the eNB 604 and determining resources that overlap between the first and second resource sets Common resource collection. In an example, the UE 602 may be configured with a second set of resources for receiving the second communication in the ULL communication technology, and may receive the communication in the control data related to the traditional communication technology to determine for the first communication. The first resource collection. For example, the common resource determination component 612 may receive a physical downlink control channel (PDCCH) related to the first resource set from the eNB 604. Data, such as PDSCH / PDCCH, etc.). The communication prioritization component 610 may therefore determine the prioritized communication based at least in part on the common resource determination component 612 detecting the common resource set.
In addition, in one example, the communication prioritization component 610 may prioritize the first or second communication based on one or more aspects of a common resource set. For example, at block 708, the UE may determine whether the first resource set in the common resource set corresponds to broadcast data, including DM-RS resources, including EPDCCH, or includes corresponding to a specific MCS, resource allocation size, or layer. The number of data. In an example, the common resource determination component 612 may determine whether at least a first resource set in the common resource set corresponds to broadcast data, including DM-RS resources, including EPDCCH, or includes information corresponding to a specific MCS, resource allocation size, or layer. Number of data. For example, the communication prioritization component 610 may be configured to determine whether to prioritize the first communication or the second communication based on a determination made by the common resource determination component 612. In an example, the determination may be further based on the configuration or other information received from the eNB 604 or another network node, the configuration stored in the memory of the UE 602, etc., which is based on the first resource in the common resource set The associated content of the collection specifies when to prioritize the first or second communication. In a specific example, the communication prioritization component 610 may correspond to a broadcast resource including a DM-RS resource, including an EPDCCH, or a first resource set in a common resource set, or a number corresponding to a specific MCS, resource allocation size, or layer In the case of at least one of the data, the first communication is prioritized when decoding the communication received on the common resource set. Similarly, the communication prioritization component 610 may otherwise prioritize receiving a second communication when decoding a communication received on a common set of resources.
For example, the communication prioritization component 610 may determine whether the first resource set in the common resource set corresponds to the broadcast material. For example, the UE 602 may perceive both a traditional broadcast channel (e.g., based on decoding a PDCCH from the eNB 604) and a ULL channel (e.g., based on receiving an allocation of a second resource set corresponding to the ULL channel). In one example, the communication component 361 may decode a Radio Network Temporary Identifier (RNTI) corresponding to the UE 602 (e.g., System Information (SI) -RNTI, Paging (P) -RNTI, Random Access (RA) -RNTI Etc.) to determine whether the broadcast material exists in the first resource set. If there is, the common resource determination component 612 may determine whether the first resource set overlaps the second communication (eg, ULL data) on the second resource set, where the overlapping resources define a common resource set. In the case where there is overlap, the communication prioritization component 610 may determine to prioritize receiving broadcast material at least in the common resource set instead of receiving the second communication. In this example, the communication prioritization component 610 may determine to receive the second communication in the non-overlapping remaining resources of the second resource set. In either case, prioritizing broadcast data in this regard can ensure that UE 602 receives broadcast data from eNB 604, which can be more critical than ULL data.
In another example, the communication prioritization component 610 may determine whether the first resource set in the common resource set corresponds to a DM-RS resource for DM-RS transmission or otherwise includes one or more of traditional communication technologies. Multiple DM-RS transmissions. This may include: the communication component 361 determines that the first resource set is related to a DM-RS area (e.g., the DM-RS area 506 in FIG. 5) reserved for transmitting resources for transmitting the DM-RS in the conventional communication technology or Including the DM-RS area, this may be based in part on the DM-RS decoded on the resource area; the priority information receiving component 614 receives from the eNB 604 the actual resource elements in the DM-RS area for DM-RS transmission The indication (e.g., in a DM-RS configuration received from the eNB 604 or another network entity) may include a DM-RS configuration for matching around the DM-RS rate in decoding traditional communications, and the like. In the case where the DM-RS resource and the ULL data resource overlap, if one time slot of the DM-RS is punctured, it is possible to decode a traditional channel based on the DM-RS for a rank less than or equal to four. However, if the two time slots of the DM-RS are punctured, the traditional channel may not be decoded because the DM-RS may not be effectively processed.
In any case, the UE 602 can perceive resources (referred to as DM-RS related resources) and ULL channels (e.g., DM-RS related resources) that are reserved or used for DM-RS transmission in traditional communication technologies (e.g., on a first resource set) Based on receiving the allocation of the second resource set corresponding to the ULL channel). The common resource determination component 612 can therefore determine whether the DM-RS related resources overlap the second communication (eg, ULL data) on the second resource set, where the overlapping resources can define a common resource set. An example of overlapping ULL resources is shown in FIG. 5 as the ULL transmission resources 514 of the overlapping DM-RS region 506. In the case where there is overlap in the common resource set, the communication prioritization component 610 may determine to prioritize receiving the first communication (for example, on the DM-RS related resource) in at least the common resource set instead of receiving the second communication . In this example, the communication prioritization component 610 may determine to receive the second communication among the remaining resources of the second resource set.
In a more specific example, the communication prioritization component 610 may determine to prioritize receiving the first communication on a common resource set and / or receiving the first communication on a specific resource within the common resource set and transmitting on those specific resources. DM-RS. For example, the communication prioritization component 610 may determine to prioritize receiving the first communication on a common resource set corresponding to a DM-RS symbol in a conventional communication technology, corresponding to a specific resource element where the DM-RS is transmitted, and the like. In one example, the prioritized information receiving component 614 may receive an indication of which resource elements the symbol includes a DM-RS transmission (eg, in the DM-RS configuration from the eNB 604). Therefore, the communication prioritization component 610 may determine to prioritize the reception of the second communication on the second resource set other than the common resource set and / or the reception of symbols other than the common resource set or among the symbols in which the DM-RS is transmitted A second communication on a resource element outside a specific resource element. In yet another example, the communication prioritization component 610 may determine to prioritize the first communication on a part or a single one of the specific resource elements in the common resource set where the DM-RS is received and transmitted, and the communication prioritization component 610 may therefore decide to receive the second communication in the remaining resource elements in the common resource set.
In another example, in a case where the first resource set is not related to the broadcast material and does not include a DM-RS (eg, resources in the non-DM-RS area 504), the communication prioritization component 610 may determine the common resource set Whether the first resource set in the EPDCCH includes data corresponding to a specific MCS, resource allocation size, or number of layers may be given a higher priority in some examples. This may include the communication component 361 decoding the PDCCH corresponding to the first resource set from the eNB 604 to determine whether the first resource set includes an EPDCCH, a specific MCS, a specific resource allocation size, or a specific number of layers. For example, having a higher MCS (e.g., reaching a threshold MCS or an MCS corresponding to one or more designated MCSs), a resource allocation size (e.g., reaching a threshold allocation size or corresponding to one or more designated MCS sizes) Data on resource allocation size) or number of tiers (eg, reaching a threshold number of tiers or corresponding to one or more specified number of tiers) may indicate data that is sensitive to resource availability. As an example, if some of the allocated resources are reallocated and thus become unavailable, a combination of MCS and resource allocation size that results in a high coding size (eg,> 0.5) may be sensitive to resource availability. As another example, data transmission with two or more layers may also be more sensitive to excess resources. Thus, for example, in these cases, the communication prioritization component 610 may decide to prioritize this material to help ensure receipt of the material. The common resource determination component 612 can therefore determine whether the first resource including the EPDCCH or a specific MCS, resource allocation size, or number of layers overlaps the second communication (eg, ULL data) on the second resource set, which can define a common Resource collection. In the case where there is overlap in the common resource set, the communication prioritization component 610 may determine to prioritize receiving the first communication (for example, EPDCCH or having a specific MCS, resource allocation size, number of layers, etc.) in the common resource set. Information) rather than second communications. In this example, the communication prioritization component 610 may determine to receive the second communication in the remaining resources of the second resource set.
In the above example, it is described that the common resource determination component 612 determines whether the common resource set exists after determining that the first resource set is related to a specific transmission. It should be appreciated, however, that the common resource determination component 612 may determine a common resource before determining whether the first set of resources is related to a particular transmission. In this example, in a case where the common resource determination component 612 does not detect an overlapping resource with the second resource set, it may not be necessary to make a determination about transmissions occurring on the first resource set.
In addition, it should be understood that the communication prioritization indicating component 624 can configure the above functions of the communication prioritization component 610, the priority information receiving component 614 can receive the above functions and the communication prioritization component 610 is providing the information to the UE 602 The above functions can be used when prioritizing communication on resources. In this regard, the scheduling component 302 may transmit the first communication on the first resource set and the second communication on the second resource set, while selecting the first or second communication for transmission on the common resource set to facilitate the UE 602 Receive the appropriate communication according to the configuration described above.
In another example, the UE 602 may process the status of the overlapping first and second resource sets as an error event. In other words, the UE 602 may not expect to receive the first communication and the second communication using a common resource set. In this case, if the common resource determination component 612 detects overlapping transmissions for the first communication and the second communication, the communication component 361 may discard at least one of the two communications. Discarding may depend on some rules similar to those discussed above, which may be configured in the UE 602 (e.g., by the eNB 604 or another network entity) or otherwise stored in the relevant group at the UE 602 State, etc.
In addition, for example, the communication component 361 can simultaneously receive the first communication and the second communication on the common resource set, and can perform interference cancellation when decoding the individual communications. In addition, in an example, the communication component 361 may receive the first communication and the second communication on the first and second resource sets that are not in the common resource set at the same time. Therefore, for example, in a case where the common resource determination component 612 does not determine a common resource between the first and second communications, the communication component 361 may receive and decode the first without prioritization by the communication prioritization component 610. And second communication.
In another example, the first or second set of resources may correspond to different UEs, and therefore one UE may not perceive that the resources overlap with resources assigned to another UE. FIG. 8 illustrates a method 800 for managing (e.g., by an eNB) resource allocation to avoid overlap and / or provide information to UEs related to prioritized communications. At block 802, the eNB may allocate a first resource set for transmission of one of the first communications according to a first TTI, and at block 804, the eNB may allocate a second resource set for transmitting according to a One of the second TTIs is a second communication, wherein the second TTI is smaller than the first TTI. In one aspect, the traditional resource allocation component 620 (FIG. 6) may allocate the first resource set for transmitting the first communication according to the first TTI, and the ULL resource allocation component 622 may allocate the second resource set For transmitting the second communication according to the second TTI. As described, the first TTI may be a sub-frame in a duration (eg, where the first communication is related to LTE), and the second TTI may be one symbol, two symbols, a time slot, etc. in the duration. In addition, the first resource set and the second resource set may correspond to the same or different UEs. In any case, the ULL resource allocation component 622 may attempt to avoid overlapping with the first resource set and / or vice versa when allocating the second resource set.
For example, complete avoidance of overlap may not occur or may not be possible in some situations. In an example, the ULL resource allocation component 622 may attempt to allocate a second resource that overlaps the first resource set in the common resource set by determining that the first resource set is related to one or more channels that are not sensitive to puncturing. set. For example, the ULL resource allocation component 622 may determine that a specific MCS, resource allocation size, number of layers, etc. (such as MCS below a threshold, resource allocation size, number of layers, etc.) are related to channels in traditional wireless technologies. Etc.) of a second set of resources for allocation to the UE 602 to facilitate ULL communication. In another example, the ULL resource allocation component 622 may attempt to allocate a second resource set of a first resource set in an overlapping non-DM-RS area in a common resource set, so as to avoid interference with DM-RS transmission (or at least avoid All symbols of DM-RS are overlapped).
In these or other examples, at block 806, the eNB may optionally indicate to the UE one or more parameters regarding prioritizing communications received on at least a portion of the first or the second set of resources. In one aspect, the communication prioritization indication component 624 may indicate to the UE 602 one or more parameters regarding prioritization of communications received on at least a portion of the overlapping first or second set of resources. The priority information receiving component 614 can receive the instruction, and the communication priority component 610 can therefore prioritize the communication on the first or second resource based at least in part on the instruction. For example, the indication may indicate that a resource related to the first resource set in the second resource set (e.g., for uPDCCH assignment) is unavailable (e.g., for communication on the second resource set (which may be related to another UE), and therefore the communication prioritization component 610 may determine that the second resource set is not received in at least a part of the second resource set that may overlap the first resource set based on the indication. Communication, as described. For example, the indication may include one or more uPDCCH bits that can be processed by the ULL UE. In another example, the first set of resources may include one or more REs (eg, for different UEs) where the DM-RS is transmitted. In this example, the indication may specify a DM-RS symbol, a DM-RS resource element, or otherwise relate to whether to perform rate matching for the second communication around the DM-RS RE in the assigned resource block ( For example, in the case where the DM-RS RE may overlap with the traditional transmission in the first resource set). In this example, the communication prioritization component 610 may therefore determine whether to perform rate matching around the associated DM-RS RE when decoding the second communication based on the indication.
At block 808, the eNB may transmit a first resource grant corresponding to the first resource set on a downlink control channel, and at block 810, may transmit a corresponding resource grant on the downlink control channel. The second resource grant of the second resource set. In one aspect, the scheduling component 302 may transmit a first resource grant (eg, a resource grant 680) corresponding to a first resource set on the downlink control channel (eg, to one or more UEs) And a second resource grant (eg, resource grant 680) corresponding to the second resource set (eg, to one or more UEs or one or more different UEs) may be transmitted on the downlink control channel. In one example, the ULL resource allocation component 622 may allocate a second resource set (eg, at block 804) and the scheduling component 302 transmits a first communication on the allocated first resource set. This situation may not allow the allocation of ULL resources to be planned, which may result in overlapping resources as described in FIG. 5.
It is understood that the specific order or hierarchy of steps in the processes disclosed is an illustration of exemplary approaches. Based on design preferences, it is understood that the specific order or hierarchy of steps in the process can be reconfigured. In addition, some steps may be combined or omitted. The accompanying method solutions present the elements of the various steps in a sample order and are not meant to be limited to the specific order or level presented.
The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects. Therefore, the scope of patent application is not intended to be limited to the form shown herein, but will be given a complete category consistent with the scope of patent application in the language. State so)), and means "one or more." Unless explicitly stated otherwise, the term "some" refers to one or more. All structural and functional equivalents of the elements in the various aspects described herein that are generally known to or will become known to those skilled in the art are expressly incorporated herein by reference, and are intended to be covered by the scope of the patent application . Furthermore, nothing disclosed herein is intended to be dedicated to the public regardless of whether such disclosure is explicitly recited in the scope of the patent application. Elements not covered by the patent will be construed as means plus function, unless the element is explicitly stated using the phrase "component for ..."

100‧‧‧Wireless communication system

105‧‧‧Access point

105-a‧‧‧Access Point

105-b‧‧‧Access Point

110‧‧‧ Covered Area

115‧‧‧User Equipment (UE)

115-a‧‧‧ Hybrid UE

115-b‧‧‧Layer 2 UE

125‧‧‧ communication link

130‧‧‧ Core Network

132‧‧‧ Backbone Network Link

134‧‧‧ Backbone Network Link

200‧‧‧ access network

202‧‧‧Honeycomb Zone (Community)

204‧‧‧ Giant eNB

206‧‧‧UE

208‧‧‧Lower power eNB

210‧‧‧ Honeycomb area

302‧‧‧Schedule

310‧‧‧Evolved Node B (eNB)

316‧‧‧Transfer (TX) processor

318TX‧‧‧Transmitter

318RX‧‧‧Receiver

320‧‧‧ Antenna

350‧‧‧UE

352‧‧‧antenna

354RX‧‧‧Receiver

354TX‧‧‧Transmitter

356‧‧‧Receive (RX) Processor

358‧‧‧ Channel Estimator

359‧‧‧Controller / Processor

360‧‧‧Memory

361‧‧‧Communication component

362‧‧‧Data Store

367‧‧‧Source

368‧‧‧TX processor

370‧‧‧RX processor

374‧‧‧Channel Estimator

375‧‧‧Controller / Processor

376‧‧‧Memory

400‧‧‧timeline

402‧‧‧Timeline

500‧‧‧ subframe

502‧‧‧ traditional downlink transmission resources

504‧‧‧non-demodulation reference signal (DM-RS) area

506‧‧‧ Demodulation Reference Signal (DM-RS) area

510‧‧‧Ultra-low-latency (ULL) transmission resources

512‧‧‧ultra-low-latency (ULL) transmission resources

514‧‧‧Ultra Low Latency (ULL) Transmission Resources

600‧‧‧ system

602‧‧‧UE

603‧‧‧ processor

604‧‧‧eNB

605‧‧‧Memory

606‧‧‧ Transceiver

607‧‧‧Bus

608‧‧‧ uplink signal

609‧‧‧ downlink signal

610‧‧‧Communication Prioritization Component

612‧‧‧Common resource determination component

614‧‧‧ Priority information receiving component

620‧‧‧ traditional resource allocation component

622‧‧‧ULL resource allocation component

624‧‧‧Communication Priority Indication Component

653‧‧‧Processor

655‧‧‧Memory

656‧‧‧Transceiver

657‧‧‧Bus

680‧‧‧ Grant of resources

700‧‧‧ Method

702‧‧‧block

704‧‧‧block

706‧‧‧block

708‧‧‧block

800‧‧‧ Method

802‧‧‧block

804‧‧‧block

806‧‧‧block

808‧‧‧block

810‧‧‧block

To facilitate a more complete understanding of the aspects described herein, reference is now made to the drawings, in which like elements are referenced by like numbers. These drawings should not be construed as limiting the invention, but are intended to be illustrative only.

FIG. 1 shows a block diagram conceptually illustrating an example of a telecommunications system according to the aspects described herein.

FIG. 2 is a diagram illustrating an example of accessing a network.

FIG. 3 is a diagram illustrating an example of an evolved Node B and a user equipment in an access network.

FIG. 4 is a diagram illustrating an example timeline for uplink bandwidth allocation.

FIG. 5 is a diagram illustrating an example sub-frame with collision legacy and ultra-low-latency (ULL) resources.

FIG. 6 is a diagram illustrating an example system for determining whether to prioritize traditional or ULL communications according to aspects described herein.

FIG. 7 is a flowchart of an example method for determining whether to prioritize traditional or ULL communications according to aspects described herein.

FIG. 8 is a flowchart of an example method for allocating traditional and ULL communication resources according to aspects described herein.

Claims (12)

A method of wireless communication includes: Allocate a first resource set for transmitting a first communication according to a first transmission time interval (TTI); Allocate a second resource set for transmitting a second communication according to a second TTI, wherein the second TTI is smaller than the first TTI; Transmitting a first resource grant corresponding to one of the first resource sets on a downlink control channel; and A second resource grant corresponding to one of the second resource sets is transmitted on the downlink control channel. The method of claim 1, further comprising indicating to a user equipment an unavailability of resources related to at least a portion of the first resource set. The method of claim 1, wherein allocating the second resource set includes at least in part a modulation and coding scheme, a resource allocation size, or a number of layers corresponding to one or more channels corresponding to the first resource set. At least one of allocates the second resource set to partially overlap the first resource set. The method of claim 1, further comprising indicating to a user equipment whether to surround one or more demodulation references in the first resource set based at least in part on determining the second resource set overlaps the first resource set. Signal resource elements perform rate matching. The method of claim 1, wherein allocating the second resource set includes allocating the second resource set to avoid overlapping the first resource set in a portion of the first resource set corresponding to one or more demodulation reference signals. . The method of claim 1, further comprising granting and transmitting the first communication according to the first resource, wherein the second resource set is allocated during the transmission of the first communication. An evolved Node B (eNB) for wireless communication, including: A transceiver; At least one processor communicatively coupled to the transceiver via a bus for communicating signals in a wireless network; and A memory, which is communicatively coupled to the at least one processor and / or the transceiver via the bus; The at least one processor and the memory are operable to: Allocate a first resource set for transmitting a first communication according to a first transmission time interval (TTI); Allocate a second resource set for transmitting a second communication according to a second TTI, wherein the second TTI is smaller than the first TTI; Transmitting a first resource grant corresponding to one of the first resource sets on a downlink control channel via the transceiver; and A second resource grant corresponding to one of the second resource sets is transmitted on the downlink control channel via the transceiver. For example, the eNB of claim 7, wherein the at least one processor and the memory are further operable to indicate to a user equipment the unavailability of resources related to at least a portion of the first resource set. As in the eNB of claim 7, wherein the at least one processor and the memory are operable to be based at least in part on a modulation and coding scheme corresponding to one or more channels of the first resource set, a resource allocation size, or At least one of the number of layers allocates the second resource set to partially overlap the first resource set. As in the eNB of claim 7, wherein the at least one processor and the memory are further operable to indicate to a user equipment whether to surround the first resource based at least in part on determining that the second resource set overlaps the first resource set. One or more demodulated reference signal resource elements in the set perform rate matching. For example, the eNB of claim 7, wherein the at least one processor and the memory are operable to allocate the second resource set to avoid overlapping in a part of the first resource set corresponding to one or more demodulation reference signals The first resource set. For example, the eNB of claim 7, wherein the at least one processor and the memory are further operable to grant and transmit the first communication according to the first resource via the transceiver, wherein the second resource set is at the first communication Allocated during transmission.